Alternatives to cosfa.co.jp
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cosfa.co.jp is registered with whois.jprs.jp and is hosted on AS131965 in Japan. Its SSL certificate from Let's Encrypt expired on 5 Apr 2024, and the site does not support HTTP/3.
What security vendors and the WOT community say about this domain.
What loads and tracks visitors when the homepage opens.
Running a full browser scan of the homepage… This takes about a minute.
108 similar domains registered in the last 90 days — possible typosquatting or phishing.
| Domain | Why it’s similar | Registered | Status | Report |
|---|---|---|---|---|
| cosfa.xyz | Other extension | 9 Nov 2026 | Checking… | Report → |
| costa.be | Typo | 8 Nov 2026 | Checking… | Report → |
| costa.realty | Typo | 6 Nov 2026 | Checking… | Report → |
| costa.fit | Typo | 17 Oct 2026 | Checking… | Report → |
| cosca.live | Typo | 10 Oct 2026 | Checking… | Report → |
From CubDomain's daily newly registered domains. Similar doesn't mean malicious.
Is cosfa.co.jp’s name taken on other extensions?
Estimated visitors and engagement.
| Top countries | Share | Visits | Desktop | Mobile |
|---|---|---|---|---|
| Japan | 100% | — | — | — |
3 technologies detected across 3 categories.
Detected from headers, page source and DNS · Automatic and may be incomplete · Suggest a correction
Every IP address cosfa.co.jp resolves to, and where it's hosted.
| Host | IPv4 address | TTL |
|---|---|---|
| cosfa.co.jp | 183.90.235.35 | 3600 |
| Host | Mail server | TTL |
|---|---|---|
| cosfa.co.jp | 1 ASPMX.L.GOOGLE.COM | 3600 |
| cosfa.co.jp | 5 ALT1.ASPMX.L.GOOGLE.COM | 3600 |
| cosfa.co.jp | 5 ALT2.ASPMX.L.GOOGLE.COM | 3600 |
| cosfa.co.jp | 10 ALT3.ASPMX.L.GOOGLE.COM | 3600 |
| cosfa.co.jp | 10 ALT4.ASPMX.L.GOOGLE.COM | 3600 |
| Host | Name server | TTL |
|---|---|---|
| cosfa.co.jp | dns102-1.jp1.ecl.ntt.com | 60 |
| cosfa.co.jp | dns102-2.uk1.ecl.ntt.com | 60 |
| cosfa.co.jp | dns102-3.us1.ecl.ntt.com | 60 |
| cosfa.co.jp | dns102-4.sg1.ecl.ntt.com | 60 |
| Host | Text | TTL |
|---|---|---|
| cosfa.co.jp | "google-site-verification=1WTPmMwlLi1jhHOFaYNpt8J-Yk4x1Pss0WyUvL-IPf8" | 3600 |
| cosfa.co.jp | "google-site-verification=h3oOr6wBDpKxRhlW1FWwpngczyz0bK7VOYRqRQ_ABOw" | 3600 |
| cosfa.co.jp | "google-site-verification=ZeymGX7x82O8rHMI68YqA8DzyAkMAUv5WPqJ3mk5WXA" | 3600 |
| cosfa.co.jp | "MS=8CE70C391B61CE0CFAFE619B04074F3BB790B4E3" | 3600 |
| cosfa.co.jp | "MS=ms95853725" | 3600 |
| cosfa.co.jp | "pardot800653=6153bacf31d67952f761eea3812b8bf2729ac2d5c9d99a28538187f020c373b1" | 3600 |
| cosfa.co.jp | "v=spf1 +ip4:153.149.0.0/16 +ip4:153.139.234.163 +ip4:13.71.133.58 include:aspmx.pardot.com include:_spf.google.com include:_spf.activegate-ss.jp ~all" | 3600 |
| Host | Start of authority | TTL |
|---|---|---|
| cosfa.co.jp | dns102-1.jp1.ecl.ntt.com ecl.ntt.com 1 7200 900 1209600 86400 | 60 |
Other domains served from 183.90.235.35. Normal for shared hosting and CDNs.
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Reviews are from CubDomain users and are separate from the security verdicts above.
Common questions, answered from this report's data.
cosfa.co.jp has no community safety rating yet. Its SSL certificate expired on 5 Apr 2024. See Security →
cosfa.co.jp is registered through whois.jprs.jp. See WHOIS →
cosfa.co.jp is served from 1 IP address, mainly on AS131965 in Japan. See Hosting →
We detected 3 technologies, including Google Hosted Libraries, Google Analytics and jQuery. See Built with →
Raw registry data for cosfa.co.jp. May be redacted by privacy services.
[ JPRS database provides information on network administration. Its use is ] [ restricted to network administration purposes. For further information, ] [ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e' ] [ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'. ] Domain Information: [ドメイン情報] a. [ドメイン名] COSFA.CO.JP e. [そしきめい] いわせこすふぁかぶしきがいしゃ f. [組織名] 岩瀬コスファ株式会社 g. [Organization] IWASE COSFA CO.,LTD. k. [組織種別] COドメイン l. [Organization Type] CO m. [登録担当者] MN31434JP n. [技術連絡担当者] HI19692JP p. [ネームサーバ] dns102-1.jp1.ecl.ntt.com p. [ネームサーバ] dns102-2.uk1.ecl.ntt.com p. [ネームサーバ] dns102-3.us1.ecl.ntt.com p. [ネームサーバ] dns102-4.sg1.ecl.ntt.com s. [署名鍵] [状態] Connected (2024/03/31) [登録年月日] 1998/03/23 [接続年月日] 1999/03/16 [最終更新] 2023/04/01 01:07:43 (JST)
The first response from http://www.cosfa.co.jp, before any redirect: caching, server and policy headers.
Four timed TCP connections to port 443 from CubDomain's servers.
CubDomain is not affiliated with cosfa.co.jp. Data is collected independently from public sources and some figures are estimates, provided for information only.
Spam and malware blocklists for the site's IP and mail servers.
When the site first appeared, and what has changed since.
We record what changes from the next time this report is refreshed.
Found in public certificate transparency logs.
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